the ratio of the radii of two cylinders is 2:3. Find the ratio of their volume
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Let the radii be 2x and 3x, let the height be 5y and 3y. so, ratio of volume =r²h/R²H =(2x)²×5y/(3x)²×3y =20x²y/27x²y =20/27, ratio of CSA =rh/RH =2x×5y/3x×3y =10xy/9xy =10/9
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